more changes on original files
[linux-2.4.git] / arch / mips / gt64120 / momenco_ocelot / fixup-ocelot.c
1 /*
2  * Copyright 2001 MontaVista Software Inc.
3  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
4  *
5  * arch/mips/gt64120/momenco_ocelot/pci.c
6  *     Board-specific PCI routines for gt64120 controller.
7  *
8  * This program is free software; you can redistribute  it and/or modify it
9  * under  the terms of  the GNU General  Public License as published by the
10  * Free Software Foundation;  either version 2 of the  License, or (at your
11  * option) any later version.
12  */
13 #include <linux/types.h>
14 #include <linux/pci.h>
15 #include <linux/kernel.h>
16 #include <linux/version.h>
17 #include <linux/init.h>
18 #include <asm/pci.h>
19
20 static __inline__ int pci_range_ck(unsigned char bus, unsigned char dev)
21 {
22         /*
23          * We don't even pretend to handle other busses than bus 0 correctly.
24          * Accessing device 31 crashes the CP7000 for some reason.
25          */
26         if ((bus == 0) && (dev != 31))
27                 return 0;
28
29         return -1;
30 }
31
32
33 void __init gt64120_board_pcibios_fixup_bus(struct pci_bus *bus)
34 {
35         struct pci_bus *current_bus = bus;
36         struct pci_dev *devices;
37         struct list_head *devices_link;
38         u16 cmd;
39
40         list_for_each(devices_link, &(current_bus->devices)) {
41
42                 devices = pci_dev_b(devices_link);
43                 if (devices == NULL)
44                         continue;
45
46                 if (PCI_SLOT(devices->devfn) == 1) {
47                         /*
48                          * Slot 1 is primary ether port, i82559
49                          * we double-check against that assumption
50                          */
51                         if ((devices->vendor != 0x8086) ||
52                             (devices->device != 0x1209) ) {
53                                 panic("gt64120_board_pcibios_fixup_bus: found "
54                                       "unexpected PCI device in slot 1.");
55                         }
56                         devices->irq = 2;       /* irq_nr is 2 for INT0 */
57                 } else if (PCI_SLOT(devices->devfn) == 2) {
58                         /*
59                          * Slot 2 is secondary ether port, i21143
60                          * we double-check against that assumption
61                          */
62                         if ((devices->vendor != 0x1011) ||
63                             (devices->device != 0x19) ) {
64                                 panic("gt64120_board_pcibios_fixup_bus: "
65                                       "found unexpected PCI device in slot 2.");
66                         }
67                         devices->irq = 3;       /* irq_nr is 3 for INT1 */
68                 } else if (PCI_SLOT(devices->devfn) == 4) {
69                         /* PMC Slot 1 */
70                         devices->irq = 8;       /* irq_nr is 8 for INT6 */
71                 } else if (PCI_SLOT(devices->devfn) == 5) {
72                         /* PMC Slot 1 */
73                         devices->irq = 9;       /* irq_nr is 9 for INT7 */
74                 } else {
75                         /* We don't have assign interrupts for other devices. */
76                         devices->irq = 0xff;
77                 }
78
79                 /* Assign an interrupt number for the device */
80                 bus->ops->write_byte(devices, PCI_INTERRUPT_LINE, devices->irq);
81
82                 /* enable master */
83                 bus->ops->read_word(devices, PCI_COMMAND, &cmd);
84                 cmd |= PCI_COMMAND_MASTER;
85                 bus->ops->write_word(devices, PCI_COMMAND, cmd);
86         }
87 }